- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202003-62 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: GNU Screen: Buffer overflow Date: March 30, 2020 Bugs: #708460 ID: 202003-62 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A buffer overflow in GNU Screen might allow remote attackers to corrupt memory. Background ========== GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-misc/screen < 4.8.0 >= 4.8.0 Description =========== A buffer overflow was found in the way GNU Screen treated the special escape OSC 49. Impact ====== A remote attacker, by writing a specially crafted string of characters to a GNU Screen window, could possibly corrupt memory or have other unspecified impact. Workaround ========== There is no known workaround at this time. Resolution ========== All GNU Screen users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0" References ========== [ 1 ] CVE-2020-9366 https://nvd.nist.gov/vuln/detail/CVE-2020-9366 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202003-62 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2020 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5